Insulator-supporting device.



O. G. ETTE.

' INSULATOR SUPPORTING DEVICE.

APPLICATION FILED MAY 25 1911.

1,080,57, Patented June 25, 1912.

- J mew-W ray/M r COLUMBIA PLANDGRAPH 0).. WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

CHARLES G. ETTE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO ETTE INVESTMENT COIMPANY,

OF ST. LOUIS, MISSOURI,

A CORPORATION OF MISSOURI.

INSULA'I'OR-SUPPORTING DEVICE.

Specification of Letters Patent.

Application filed May 25, 1911.

Patented June 25, 1912. Serial No. 629,351.

To aZZ whom it may concern:

Be it known that 1, CHARLES G. ETTE, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Insulator- Supporting Devices, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to insulator-supporting devices such as are used on pole cross-arms.

One object of my invention is to provide an insulator-supporting device of novel construction which is so designed that a large number of insulators can be mounted on a comparatively short cross-arm.

Another object is to provide an insulatorsupporting device that will bear on all four sides of a cross-arm and which is so designed that it can be slipped sidewise onto the cross-arm.

Other objects and desirable features of my invention will be hereinafter pointed out.

Figure 1 of the drawings is a front elevational view of a portion of a pole cross-arm provided with one of my improved insulator-supporting devices; Fig. 2 is an end view of the parts shown in Fig. 1; Fig. 3 is a front elevational view illustrating one of my improved insulator-supporting devices which is designed to carry a plurality of insulators arranged in vertical alinement with each other.

Referring to the drawings which illustrate my invention, A designates a crossarm that is adapted to be connected to a pole, not shown, said cross-arm being formed from a commercially-rolled member such, for example, as a channel. Said crossarm is provided with a plurality of insulator-supporting devices which are so constructed that a large number of insulators can be mounted on a comparatively short cross-arm. In the embodiment of my in vention shown in Figs. 1 and 2, the insulator-supporting device consists of a central cross-arm-engaging portion that embraces the cross-arm and which is adapted to be secured thereto, and insulator-pins 1 and 2 projecting upwardly and downwardly, respectively, from said central portion. Said central portion preferably comprises a diag ona'lly disposed part 8 that bears against the outer face of the vertical web of the cross-arm A, and horizontally disposed parts a and 5 which project laterally from the part 3 and which are adapted to engage the top and bottom flanges, respectively, of a channel-shaped crossarm, as shown in Fig. 2, the insulator-pin 1 being preferably formed integral with the part 1 and the in sulator-pin 2 being formed integral with the part The device is secured to the cross-arm by means of bolts, rivets, or other suitable fastening devices 6, which pass through the part 3 of the central portion of the device and through the vertical web of the cross-arm. The parts 4 and 5 of the device are provided with downwardly projecting and upwardly projecting flanges 4 and 5, respectively, which lap over the edges of the horizontal flanges of the cross-arm. By forming the central portion of the device in this manner, namely, providing it with a diagonally disposed part 3 which carries an upwardly projecting pin and a downwardly projecting pin, I am able to mount a large number of insulator-pins on a comparatively short crossarm and still maintain the required spacing or distance of ten or twelve inches between the insulators, one set of insulators being arranged above the cross-arm and the other set below the cross-arm. Still another desirable feature of such a device is that the strains which the wires exert on the insulator pins are borne by the central portion of the device which surrounds the cross-arm and bears upon both sides of same and also upon the top and bottom faces of the cross-arm. lVhile I have herein shown fastening devices 6 passing through the cross-arm the main function of said fastening devices is to prevent the central portion of the device, which carries the insulator pins, from shifting on the cross-arm or becoming displaced for the parts 3, 4, 5 and the flanges at and 5 of said central portion bear upon the cross-arm in such a manner that the strains which the wires exert on the insulator pins are transmitted directly to the cross-arm by the central portion of the device and not by the fastening devices 6. The entire device consisting of the central portion and the pins 1 and 2 is preferably formed of cast metal and integrally connected together, and, if desired, the pins can be made of approximately cruciformshape in cross section, and the inclined part 3 of the central portion of the device can be provided with a strengthening rib 3 which merges into the flanges of the insulatorpins. The part 3 of the central portion of the device which connects the upper and lower pins together can be inclined at any desired angle, and the lower pin 2 can be provided with a laterally projecting arm 2 as shown in Fig. 1, to which the head B of the pin is connected. Any preferred type of heads B can be used on the pins but I prefer to provide each pin with an integral screw-threaded head on which an insulator can be screwed. It should be understood that the structure above-described represents only one form of my invention for various changes in the shape of the central portion of the device and the arrangement of the pins thereon could be made without departing from my invention.

To arrange the device above described in operative position on a cross-arm, the central portion of the device is first arranged in the manner shown in broken lines in Fig. 1 so that the device can he slipped sidewise onto the cross-arm. Thereafter, the device is turned into the position shown in full lines in Fig. 1 so that the flanges 4 and 5 on the central portion of the device will lap over the edges of the horizontal flanges of the cross-arm, said flanges 1 and 5 preventing the device from moving laterally in one direction and the part 3 preventing the device from moving laterally in the opposite direction. The fastening devices 6 merely retain the device in adjusted position on the cross-arm and when the device is in use the fastening devices are subjected to practically no strains because the strains in one direction are taken up by the part 3 and the strains in the opposite direction are taken up by the flanges P and 5 of the device. lVhile I have herein illustrated an insulator-supporting device that is designed for use with a channel-shaped arm, I do not wish it to be understood that my invention is limited to such a construction, or to a device cast in one piece, for various changes can be made in the central portion of the device so as to adapt it to other kinds of pole cross-arms.

In Fig. 3 I have illustrated an insulatorsupporting device of substantially the same construction as the one shown in Figs. 1 and 2 except that the part 2 at the lower end of the pin 2 projects laterally in the opposite direction so that the heads B on the insulator-pins will be arranged in vertical alinement with each other.

While I have herein stated that the vertical part of the central portion of the device which embraces the cross-arm is arranged in engagement with the vertical web of the cross-arm, I do not wish it to be understood that it is absolutely necessary that the device be arranged in this manner for, if desired, the device can be arranged on the op posite side of the cross-arm.

An insulatorsupporting device of the construction above described can be manufactured at a small cost and it can be applied to or removed quickly from a crossarm. It permits a large number of insulators to be mounted on a comparatively short cross-arm and still maintain the required spacing or distance of ten or twelve inches between the insulators, and the central portion of the device, embodying the preferred form of my invention, is so constructed that practically no strain comes on the fastening devices which retain it in position. Another desirable feature of the device is that it can be arranged on either side of a channel-shaped crossarm; and still another desirable feature is that it comprises portions which embrace all four sides of the cross-arm and is so designed that it can be arranged on the cross-arm between two other insulator-supporting devices without disturbing same.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

An insulator-supporting device consisting of a central cross-arm-engaging portion which comprises a vertically-disposed diagonal part that bears against one of the side faces of the cross-arms and horizontallydisposed parts projecting laterally therefrom above and below the cross-arm and provided with integral flanges that engage the opposite side face of the cross-arm, and insulator-pins projecting in opposite directions from said horizontally-disposed parts and arranged out of vertical alinement with each other.

In testimony whereof I hereunto affix my signature in the presence of two witnesses, this twenty second day of May 1911.

CHARLES G. ETTE.

WVitnesses Enw. Sonwmnn,

IVALTER C. RAITHEL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

